1012210221 has 16 divisors (see below), whose sum is σ = 1512099648. Its totient is φ = 596880000.

The previous prime is 1012210217. The next prime is 1012210223. The reversal of 1012210221 is 1220122101.

1012210221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1012210221 - 2² = 1012210217 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1012210197 and 1012210206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012210223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 413280 + ... + 415721.

It is an arithmetic number, because the mean of its divisors is an integer number (94506228).

Almost surely, 2^1012210221 is an apocalyptic number.

1012210221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1012210221 is a deficient number, since it is larger than the sum of its proper divisors (499889427).

1012210221 is a wasteful number, since it uses less digits than its factorization.

1012210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829052.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1012210221 is about 31815.2513898602. The cubic root of 1012210221 is about 1004.0536196317.

Adding to 1012210221 its reverse (1220122101), we get a palindrome (2232332322).

The spelling of 1012210221 in words is "one billion, twelve million, two hundred ten thousand, two hundred twenty-one".